<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  
</body>
<script>
  const user={
    data:{name:'tom',age:22},
    set age(value){
      if(value>100){
        throw new Error("年龄格式错误")
      }
    }
  }

  user.age = 333
</script>
</html>